(1) The owner or operator of a municipal solid waste landfill must maintain records and prepare reports as prescribed in this section and in the department's implementing rules adopted pursuant to RCW 70A.540.020.

(2) The owner or operator of a municipal solid waste landfill must maintain records related to monitoring, testing, landfill operations, and the operation of the gas control device, gas collection system, and gas control system. The records must be provided by the owner or operator to the department or local authority within five business days of a request from the department or local authority.

(3) The owner or operator of a municipal solid waste landfill that ceases to accept waste must submit a closure notification to the department or local authority within 30 days of ceasing to accept waste.

(4) The owner or operator of a municipal solid waste landfill must submit a gas collection and control system equipment removal report to the department or local authority within 30 days of well capping or the removal or cessation of operation of the gas collection, treatment, or control system equipment.

(5) The owner or operator of either an active municipal solid waste landfill with 450,000 or more tons of waste in place or a closed municipal solid waste landfill with 750,000 or more tons of waste in place must prepare an annual report for the period of January 1st through December 31st of each year. The annual report must include a calculation of landfill gas heat input capacity. Each annual report must be submitted to the department and local authority during the subsequent calendar year, with the date of submission to be established through rules adopted by the department.

(6) The owner or operator of an active municipal solid waste landfill with fewer than 450,000 tons of waste in place must submit a waste in place report to the department or local authority.